Home / Standards / GB/T 20456-2008 GB/T 20456-2008 Forestry machinery — Portable chain-saws — Performance of passive chain brake 林业机械 便携式油锯 被动式锯链制动器性能 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A